ETH has not capacity to do that, it's not their concern, any project who wants to build a token under the ETH platform can do anytime they want.
To minimize the scams is our responsibility as if we are an active supporters of ETH platform, we should help in spreading information to newbies who wants to invest, especially during the ICO.

Moreover, the government also has a responsibility to make necessary law to punish those who try to scam people, and this law should be properly monitored and implemented.